Aly, this may not help you...but if he is all that you've ever wanted, why not taking him then? I know, I know, easier said than done. But you said you'll be gone for 6 weeks in the fall...it's a long way till fall, I know you can do it and make him not do his business inside the house (sorry, not wake yet, can't find certain words), and I'm sure your mom would fall in love with this little cutie, who woulnd't? She can't say no .
Okay, of course only you know what's the best thing to do. Whatever you decide, let us know ok?