You're talking exactly like someone I know who I'm helping get into this business. Stop being so damn pessimistic otherwise you won't succeed at anything you do.
Don't try and use mega sponsors for building galleries. Bang Bros, Nastydollars, Silvercash etc - their content is used by thousands of people the moment new content is released. They're far too oversaturated to use for TGP submits.
If you want to promote BTRAsses for example, you'd be best off buying some exclusive big boob content and using that in a gallery to promote the site. Nobody will care if that particular model isn't actually part of the website. As you're strapped for cash, you can't really take that route yet.
Check through directories of TGPs like on
XBiz and find smaller TGPs to submit to. Your galleries seemed ok to me, just find a lesser used sponsor. CCBill-using sponsors are usually smaller than the big boys and so they'll be a lot easier to use content wise.
By the way, this business is very competitive and tough. It's effectively self employment, and running any kind of business is very demanding. If you're persistent, then the work, time and money put into the business will pay off. This isn't a quick buck business though, so be prepared to go a while without making much (or any) money.