Hmmm, I’m not the best person to answer that as I’m just about to embark on a SS set up myself and finding that for something that preaches simplicity, it can get really rather complicated if I allow it!!
In your situation and from what Ive gleaned thus far, there are definitely ways to do it with things like ‘magic ratio’s’ or some such, and from my searching on the Great Big SS Thread on retrobike, reading through articles on the Surly site, Velo Solo, Charlie the bike monger et al, many people seem to somehow set their’s up with vertical drop outs without tensioner’s which I’m curious about and in awe of in the same way, leaving me wondering how they manage to remove or refit the rear wheel if they puncture?
Alternatively, there are BB mounted tensioners, although aesthetics wise, they don’t do it for me personally.
Apparently, there is a faceache page called One Cog, that is a mine of information, although my visits to FB are few and the search on there I did, yielded nil points.
Sorry I can’t be of much more help, if any. Although I have found that those who do SS are an incredibly friendly bunch and very forthcoming with info and advice.
Repairng alu drop-out’s / hangers is something Ive always thought very tricky to do and it seems a shame for you to lose such a loved frame for this.