The developer could not give them away. 

I am extremely new to the real estate game and my boyfriend and I are looking into purchasing property in the DFW area. 

It's the playbook for this game in NJ.  

Foreclosures are not a beginner's game.

I feel I have a lot to learn when it comes to key topics like finding properties, analyzing deals, and doing due diligence.Does anyone have ideas on how to add value to investors in exchange for learning the game from them, or even just shadowing them?

Municipalities will Not be common buyers for vacant land....not sure how you came to that conclusion.The vast majority of vacant land you can buy this way will have No value to a builder.....there is a reason people so often let these properties go to tax auction and it would be very difficult for you to determines the paths of growth and what would be desirable to a builder/developer.

It's a back and forth game they play.

But that's the real estate game. 

I figured that I could get one week long rental and two weekends during peak season, every home game during football season (7 weekends), then about 1 weekend per month in the offseason. 

Not all CPAs have developed a niche in it or even deal with it.