I'm concerned because you've described yourself as being in a position where you're considering (in my view) over-investing in him right now because you're afraid to lose him. That is a red flag to me.
So my question is: What is the best thing for your kids? I would say it is your making sound, rational decisions based on the best and most complete information you have in order to give them the most stable, loving home you can provide. Would allowing yourself or the kids to get attached to someone who may not be there in a year provide the best life and stability for the kids?
I second what mutatio said about the turtle's pace.
