First of all ... I suggest that you hook up with a few good up and coming makeup artists wheo can also do hair and who want to test for prints and who could work with you on your model's portfolio shoots. You can't do it all and do it well.
As the stylist ... you have to consider what your goal is. If you are helping style a model's portfolio shoot (she's paying you/your husband), you must understand what she will need in her portfolio which will be a variety of styles. So if she has an agent, have her ask what she needs. If she doesn't, you need to find out what the market is that she's looking to go into. I see you are in Tampa ... probably a very commercial market which means "pretty girl next door" looks ... not fashion. But if she's heading to Miami ... well that can be heavier in fashion looks but she'll certianly need a great swimsuit shot as well. Remember, the main goal of a model's test is to make her shine ... not what she is wearing, so simple is usually better, as long as it flatters her ... showing assets and diguising flaws.
Next, you and your husband, as photographer and stylist need to build beyond model's portfolios so you'll be planning more ambitious shoots. You should take all the known factors such as what the model(s) looks like and the location of the shoot into account and brainstorm for a concept or theme (sometimes called a story). Both photographers and stylists need stories in their books ... to prove that they can produce a series of images that is cohesive and makes visual sense. Use the editorials in magazines as good examples.
You can build a story around a color, on a certain garment like what do do with skirts or an accessory, or almost anything. Remember that your resources will be limited ... consider where will you be getting wardrobe and accessories ... so try to work with what you can get. Thrift stores are a treasure trove for beginning stylists, if you have a good eye (and you better, if you aspire to be a stylist) and the patience and creativity to put it all together and a way that works.
Keep it simple, to start ... don't over do it, the mistake of most new stylists. Less is almost always more ... unless your story is about excess. A bold and graphic shape on a garment ... without any accessories other than killer shoes can be a strong statement ... and if you can find 3 or 4 similarily bold shapes ... that can be your story right there. Avoid small accessories ... they always seem to clutter up the image without making a statement (except that i will look amateur). An accessory needs to be placed there on purpose, because it ads to the image. So have your models take off all jewelry first (including piercings and wedding rings) and you add back on what works. No sweet necklaces and matching earrings, no little chains and no hearts and flowers. Here's the sort of thing that does work: One big bold chunky necklace ... but no earrings, works well. Or a big bunch of bangles on one arm makes an impact with a bright, sexy pair of shoes in either the same or a complimentary color is another way to make accessories work. And unless the model is an experienced pro ... handbags can be disasterous ... most new models don't know how to work them. And if it's for her portfolio, get rid of any bags ... they draw they eye away from her. Hats ... have to be carefull with these too ... they can add drama, but if you want the model's face to show you have to either go without a brim ... or make sure that the photographer can light her from beneath the brim, without making her look ghoulish.
Make sure that every garment is pressed or steamed (usually by you) ... no wrinkles unless they are supposed to be there. Watch our for straps and bra showing through ... don't let gaps and pulls happen especially on buttoned shirts. On set, site across your husband's shoulders, to look at everything before he takes the picture ... that's your job ... to make sure the wardrobe is perfect.
Just some thoughts about styling ... sort of rambling ... hope it's some stuff to think about.
If you'd like ... go to my site and contact me ... I can give you more info that might help you as you start your styling business.
http://www.musecube.com/BetteT/