Vacuum reccomendations

So I have bedbugs (obviously) but don't have a vacuum with a hose that can get in the nooks and crannies of our couch. Please reccomend a vacuum to do the job. Can't afford an exterminator so I need to get a good vacuum and stuff to do it on my own. I've gotten some chemical reccomendations but not a vacuum reccomendation. Also maybe a steam cleaner that's fairly inexpensive would be nice. SOS