As an estimator in the construction industry, I second @Rodolfo Goncalves; inflated material prices and labor shortages has made development very costly right now.

As a builder, you should lock in material prices under a contract with your supplier or put a stipulation in the sales contract that pushes material increase expense on to the buyer. 

(people are offering up to $15k more then advertised price) At moment I have $15k saved in the bank.

You'll have to go underground or down back alleys to find syndication opportunities for your IRA because of the advertising prohibitions (and funding/number of allowable investor limitations) that come with 506(b) exemptions.But, please, everyone. 

Materials are one way to speed up a job. 

Keep learning, growing, and working at your goals and you will see that some of them begin to materialize.

Studying CapEx comes from experience, calling vendors and inquiring about pricing, and from going to the store and looking at costs for building materials.

Pay him one fee and he handles it all or I pay for all materials and he just charges me for his labor?

There is advertising on the podcast by the shows sponsors, however, people don't come on there pitching sales.

CapEx growth is a function of inflation of construction materials and labor cost.