As was said above, taking a mmm on/off on certain brands can be a BIG pain. The Mahindra has a drive on mower which makes it easier, but still not something you're going to want to do on a weekly basis, it will get old fast.
Also as mentioned, mowing with the FEL on leaves a lot to be desired as well as 'tractoring' with the mmm on it can be problematic.
I feel that if you want a tractor, get a tractor. If you want a lawn mower, get a lawn mower. I think your lot size (and your wallet, as well as your sanity and that of your wife) would be better served with a small tractor AND a riding lawn mower.
Saving the cost of the mmm would allow you to get a mower that would be more efficient as a mower and cheaper to run as well.
I will do some more looking this week as well as talk to the mahindra dealer in my area and will keep you all posted on what I find thanks for your help everyone I really appreciate it this is a great group in this forum!