@Rodger Curbelo
I was in a very similar predicament over the last 3 years. If you have proof of income with credit scores below 620 on all 3 credit reports you will find it very difficult to get a loan in your name. If your girlfriend has good credit over 620 and you have $20,000 between the two of you, but she has no reportable income still no loan.
If I could suggest, now is a great time to get online with all 3 credit reporting agencies and do the work yourself! I recently have done this with all 3 credit reporting agencies. After I disputed 75% of my collections and paid 25% of collections, medical bills I paid in full. After 3 months my score with Equifax jumped 90 points placing me over 670. Also be sure to always make payments on your monthly bills in time.
Lastly, be sure to not use 60% to 69% of your available credit in your credit cards. Credit reporting agencies like when you do not max out your credit cards. Do the homework and within a year you two will be in your brand new home!
Kindly yours,
Rod