The nice thing about indoor electric use (absent outdoor exhaust of course), is that it just decreases the heat needed in the rest of the house. Not 100% transferable, but mostly. I would feel worse about my electric bill otherwise, but it still would not be too bad.
The other issue with grab bag genetics though is the use of limited grow space and effort. One solution that comes to mind though is that you could just add a couple solos to your tent and test the genetics that way. Very low cost, and little interference with higher priority plants, and you could try the bud before using up prime space.
All good anyway, as long as growing a few will not risk a bare stash cupboard.