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Supply is very low, and demand is still high... part in fact due to the low interest rates too.

Not able to continue brewing because of some supply issues though.

It is simply a supply and demand issue.

Could this really cause a short supply?

I would like to take a look at what they are using as a reference myself if at all possible since from what you are saying it plays a huge role.Answer - Consultants obtain their pricing from many sources (experience, online, supply/demand, etc.), just the same as where contractors obtain their prices.

Preferably I would like to purchase a multifamily home (or home with carriage) and househack, but supply of multifamilies I could afford seems to be low.

I think it is difficult to see even that far into the future but my current hypothesis is that due to people wanting to shelter in place both supply and demand are low at the moment. 

Can the Fed hold down interest rates in the long term as the money supply increases exponentially?

Both are a 2yr program, and 98% of time they are employed making $ well before graduating because demand is sky high and supply is getting less and less.