@Mei LiThat is a very difficult question to answer.You can look at the quality of the materials.  

I think I would offer less and I roughly estimated finishing it out at 50k (a lot of building materials are included) and ask 450-500 but if anyone can offer some guidance/insight I would appreciate it

If you are pretty comfortable and liquid and can absorb the months of breakeven or slight loss without a material harm to your personal financial situation, you should probably hold out. 

Knowledge is power after all, and I love absorbing any and all material that I can.

My question today is where can I find her material to study for the Salesperson 1 & 2 and what is a good credible site where she can take the tests after studying to further proceed to the national exam?

You're not only up against property costs, but also permits, utility tie in, taxes, materials, a hot labor market, etc.

Mostly material cost, I plan on doing most of the labor myself aside from having a few friends assist with pouring the concrete pad and foundation.

https://tradingeconomics.com/united-states/housing...you know everything being equal I get that.. but this time around its not equal.. there is a big gaping hole in construction financing for new builds.. that is keeping starts down for sure.. and then land to build on.. lead times in many jurisdictions are measured in years. but I believe the prices are stabilizing.. and one thing for new construction that slows it as well is the material costs sky rocketed and there fore unless prices rise margins are too thin to build.. something has to give.. if demand for lumber calms down maybe we will see lumber come back to historic norms.. 

Absent terms in a written lease to the contrary, prior to withholding rent or vacating the premises Tenant must deliver written notice to Landlord (or his agent - do this via certified mail to LL or LL’s agent’s address, which must be given to Tenant per FS 83.5) indicating the material non-compliance and giving landlord 7 days to cure.

Figuring out how to work with those items with modern day building materials and strategies took some brainstorming.