Building sites for clients - Approaching it

Building sites for clients seems like something I'd enjoy. Having "fiddled" around in this department the last year or so I'd like to offer this as a service as well.

That being said, I'm left with a few questions on how those of you who do this approach the work involved. Here are a few questions for those that build their sites using WordPress (which I love) and your process.

To make it simple we'll pretend a local plumber wants to hire me for a site.

Images:

Do you purchase stock photos from istockphoto.com for example? Do you take pictures as well as buy photos? Do you pass off the higher cost of royalty-free stock images within the site project? For maybe 3-6 pictures you could spend $20-$100. Sound about right?

So how do you work with and deal with images (and how much are you willing to spend)?

Themes:

Do you purchase a handful of themes with dev licenses from sites like themeforest.com? Do you make your own from themes such as Headway?

Maybe stick with 3-5 or so different paid themes? Rotating them for different niches (flower shops, plumbers, HVAC etc.) and just getting to know your favorites?

Pages:

What are your "need to have" pages? Home, About, Services, Contact, Location/Hours....?

Do you offer 5-page and up sites? Testimonial pages, gallery/tours, menus and so on make for more upsells, but how do you approach which "5" to include? Do you find that it matters to the business owner?

Hosting:

A popular question. I can't tell what I'd lean towards at this point. The arguments should be familiar to most of us, but is there a greater consensus?

A) You host. You get maintenance fees, but potential headaches.
B) They host. No host maintenance (but still "change and update" fees can be negotiated of course) but possibly the affiliate pay. Far less headaches however.

Preferences here?

Lead Capture:

Same question for hosting. Do you add them onto your aweber account (or constant contact, getresponse etc) or get them their own. My thoughts steer me towards getting them their own accounts for both of the above for reasons of being more hands-off and less management. But I could be missing out on some other profits or relationships that I'm maybe not seeing?

Hopefully I've made myself clear. I'd like to do this although it's the selling of said service that can make more money rather than the doing. But at the same time, for now, I enjoy creating sites in WordPress and would like to do so.

Hearing your experience (for those that do this for a living, part or full) would be beneficial for not just myself, but for those in the background wondering the same things from time to time.

Thanks guys (and gals). I'm sure more questions will come up. I'll hammer away again when they do.