duanedr 

I'm with Unterhausen that I don't really like yokes - especially the bent metal ones. They just don't seem right. I don't think a couple extra CM of chainstay length is noticeable enough to justify them. My opinion on this doesn't really matter, other than you won't find them on my bikes -yet. Printed parts can be pretty expensive still ($1/gram and a yoke I have a couple samples and they are about 160gm each) and it seems they are often stainless which is trickier to work with. I'm certainly not an expert on it and it changes fast so, wait 5 minutes and I might not have a point!

I think you can probably get past the chainring clearance by going to 1x, the yoke idea will work (with the expense mentioned) you can find parts to make a fork work (1" steerer would be a deal breaker for me; others might not care about their teeth). The BB problem can prob be dealt with. Suitable wheels will likely be thru-axle so you need to replace the dropouts in the rear and probably need to add disc brakes.

It would seem fairly easy to go down this path and end up with a bike that is either un-rideable or not fun to live with. At this point, you might as well start with new tubes and parts and make a bike you really want that will be up to the task.