I don't blame you for worrying about this--it seems questionable. I'm not against this kind of trade in all cases--and this is just my opinion, which is all I can offer here--but I am against suggesting it after the fact, after the work is done. That's what I gather has happened to you.

Do you take it? Hard to tell from the outside. You be the judge of the relationship, the long-term value of it. If you establish the rules right now, and reject the offer of trade, will you be better off? This is a guess you'll have to make. No outsider can tell you for sure.

Tim