I would get in contact with local commercial Realtor in areas your interested in Dallas, TX. Be aware if there is rent control, average rents in area and financing. Area will make a different in asking price and rents. Know the average gross rent multiplier per area. 10 -20 unit apartment building considered commercial lending. Know lenders debt ratio and down payment requirement for prospective buyer.
Gail Mercedes Cole
EXP Realty Marina del Rey