Online RN-BSN programs

SUNY Empire State College has an online RN-BSN program. Priority goes to new York residents, but out-of-state tuition is $207 per credit, $2,485 per term if you take 12-16 credits.

I don't know about affordable, but these are the programs that I've looked into--I ended up going with Davenport University.
Davenport University: www.davenport.edu
U of Michigan-Flint: uofmflint.edu
Ferris State University: www.ferris.edu
Michigan State University: www.msu.edu