Well I guess if the game operated by different rules, for example, if I could produce teleports in the Magic Academy, then the considerations would be different. But as it is teleports are rare and need to be used carefully.and if you had 50 teleports .... ??? or 150 Teleports ???
I think you are overlooking the power of sets like
F.Ruins, P.Manor, or A.Traders ......
I suspect that with an infinite supply of teleports I still would not want an unfinished set cluttering up my inventory. There's new buildings every month, more than I have space for in my city. I regularly cull out the old stuff that is too many chapters back to be worth using.
Yes, there's Royal Restorations of course, but again, not an infinite supply. I hate to think how many it would take to keep a large set upgraded. As it is, I use RRs for smaller buildings that for one reason or another I want to keep current.
I am well aware of what the various buildings produce. Hence I put the area occupied by this unfinished set to better use.