While sure some soho wifi routers running 3rd party firmware can support vlans. To be honest just get an AP, pure and simple - I am talking a ceiling mounted POE accesspoint. One that will give you great coverage and the feature set you want/need.. Vlans, airtime fairness, band steering, DFS channels, etc..
While 3rd party firmware can breath new life into some hardware.. Your still going to have some brick looking box with some antennas sticking out of it that needs to have a power brick next to it to work.. With shitty coverage area, etc.
Unless your talking wifi for 1 room and a few people, your better off doing wifi right and deploy the correct number of AP in the correct area's..