Hi DarkEgg,
I have done "Insta-Flips" (thats what i call them) - I will try to answer your queries.
Yes, most of the time people use wordpress as their platform of choice, its easy to setup, easy to customise and there are lots of free themes & plugins to increase various aspects any webmaster would want!
I would advise sticking with wordpress, buyers are comfortable with it and with Insta-Flips you need to appeal to the undereducated masses - not specialist or experienced buyers.
Yes, it is possible to flip a website in under 24 hours, in fact i once purchased a domain, set it up for wordpress, created a custom theme and had it listed on Flippa within 3 hours! (For some people even that would be considered slow!)
- However it is generally better to get the site listed on google and other search engines first etc which can take a few days.
If you are going to try "Insta-Flips" then i have a few knowledge nuggets for you...
Bare in mind you are selling to more inexperienced and undereducated buyers (not stupid people, but they don't really know what theyre doing)
With that in mind,
1) You are selling a dream .... SO SELL IT! - Your sales pitch is your single opportunity to get them interested, write an enticing title and follow it up with something catchy, short and intriging at the top of the page, emphasise key elements in your pitch with colours etc (i am not going to teach you about writing techniques, thats up to you to research)
2) People love getting things for free, so tell them exactly what theyre going to be getting extra, BIN bonuses etc, free hosting, free setup (one of my BIN bonuses was to create a second website free in a niche of their choice)
3) Just because the buyers are inexperienced doesn't mean they won't feel ripped off ... it's your job to go above and beyond what is expected in order to provide a killer after sales service (i do this anyway with any sales i make)
4) See step 3 but start thinking about after sales, email list's etc - these people have purchased from you before and if you did a good job, they will do it again! i often tripled my income on a single sale by doing great after sales!
There is more but i think i've written enough for now, any questions let me know, i will try to answer them.