Would you pay for this: A business that helps you test business ideas

I have ideas for businesses everyday, however, I lose interest in them very quickly. I'd like to be able to test and validate the ideas before I lose interest.

The problem is, launching a test site is a pain in the butt. It requires

a) purchasing a domain and directing it to a landing page b) creating a landing page/sales page (unbounce is pretty good for this) c) launching an ad-words campaign d) installing analytics e) installing a payment/signup system to see if people will pay or signup

Here's my question, would you pay for a service that

a) allows you to "rent" domains for short periods of time (with the option to purchase it later)

b) put up a well designed generic landing page (simple text/photo editor available)

c) have built in Adwords (or equivalent) tools

d) have built in analytics data

e) has a built in signup/payment form for customers

The idea is that for a flat monthly fee, you'd be able to put up X number of test sites to validate your idea without wasting time having to do all the tedious stuff.

If you have experience putting up test sites, what is the most annoying part about the process?