What you're proposing is really great. The idea for such a partnership CAN come true, but it depends on how much do you trust the freelancer, so basically my task is to make you sure i'm trustworthy, isnt it? :D
Well I've been working with a company from the US, they've noted my proficiency and work ethic; I'm not the kind of lazy-working guy, so I'm not likely to take much time even if you are saying I can "work at leisure", but of course I wont make you hasten.
I can deliever you great apps for fair price as I said in my profile, but the latter is a subject for private talks. if I interested you - please contact me to discuss some details, we both will need to ask some questions.