Go cheap on batteries, go cheap on the solar panels, but NEVER go cheap on the charge controller! It is the heart of your system!
I starved to get the Morning star Mppt 60 back 4 years ago when it cost 800 bucks, but it has been worth every cent ten times over!
First controler was an Mppt sunsaver 15, it was a huge boost in system performance, I swore I'd never use any thing ells again, if you rely on your solar get a mppt controler!