Jennifer! While I don't personally assist with rentals, I do know that the best source to locate rentals that accept housing vouchers is affordablehousing.com! There are also some agents out of the 50,000+ agents in Houston who do assist, so hopefully someone will pop in here soon! Best of luck to y'all! No doubt you'll end up in the right place!
Yes, a real estate agent can help you in finding a rental property. The key thing is finding an owner who will accept the voucher and to make sure the rental is within the tier/payment standards. It can be difficult to find a property so best to start looking early. Also, note application fees and deposits may still be required.