I am under contract to purchase a Quadplex.

This growth typically drives significant appreciation, which is the key to making this strategy work.For example:Let’s say you purchase a property for $300,000 with 25% down in a market with an 8% annual appreciation rate.

They develop, they build, they finance, they property manage, they will have HAO, cleaning crew etc. etc. etc. so the subsidiary companies make money every step of the way.From investor perspective: The investor pay $15 K to reserve the right to purchase 25 multiplex over the year of next 5 years. 5 each year.

Thanks in advance.I am guessing you have an FHA loan on the house and the new buyer will be purchasing with an FHA loan?

I believe that many will be able to purchase a townhome or condo, but not that dream home close to the city. 

Single family has more stabilized as there is not enough people who can afford homes.The purchaser is two very distinct types of groups who buy MF vs. single family and single family is bought to own and occupy, MF is bought to generate money.

Can anyone recommend any sites, courses, videos, or books to purchase so I can prepare for the test?

If you are looking to just calculate profitability, set how much profit you want to make then:ARV - Purchase Costs - Holding Costs - Selling Costs - Desired Profit - Rehab Budget (including contingency) = Maximum Allowable OfferIF you cannot calculate those numbers, a spreadsheet isn't going to help you. 

To be successful as a real estate investor in any form - except maybe purchasing the Vanguard REIT index fund - an investor needs education, knowledge and understanding of real estate principles, real estate law, and real estate finance.  

Purchase price: $375,000 Cash invested: $30,000 This was a 2 unit that I purchased in 2016 for $375K.