And even if that doesn't work out, you'll have a lot more domain knowledge than you did before, so if you do hire someone else you'll be able to work with them

And even if that doesn't work out, you'll have a lot more domain knowledge than you did before, so if you do hire someone else you'll be able to work with them easier, understand the work they're doing, and have a better chance of noticing if you're being taken for a ride.