Again visa question, please be patient with me

Hello all ;

I found quite a few information on line , but somehow none of them
cuts really well to my situation .

Are two of us , but not married .
We have income 1. my alimony, about $1500
and my boyfriend has
2 . his condo rented, about the same amount of money .

I am 61, he is younger a few good years .

Can we get residential visas under this condition ?
Visas , which would lead surely to permanent status ?
We do not plan buy any real estate now , we do not want to sale now what we have in US .

This is very burning question for me ,because few years ago we already decided to move to Mexico, we did , and now new emigration law and visa requirements kicks us practically out, or makes
legalization of staying prohibitive expensive  and troublesome .

I would appreciate an answer very, very much .

regards eva