For example, drop the price to $1,500 but require a credit score of 700+ and a double deposit.

I understand your points, but I want to clarify the tax consequences in my example.

Example, I know an investor that paid 150K for a 3 br with rent of 1500.

Look at this year's storms in Asheville, perfect example. 

We want him to come back, and to engage with the community, learn how to ask the right questions, buy investment property that makes him rich, and for him to have such an awesome experience and make so much money in real estate over the next few years that he stays on BiggerPockets for 10-20 more years answering questions for other newbies, learning from the example of @miguel del mazo - who provided an incredible and useful response. 

For experienced investors, do you see a scenario where an investor would assume the properties at a reduced rate which would allow us to cash out and them the opportunity to earn some easy money while holding the properties.For example: Say if we wait, we will sell the properties for $1M.

For example we took over a property from another management company and they only provided us with the lease and ledger and refuse to give us the application (this has happened many times).

Looking for examples of writing up  business plan and marketing plan.

For example, I handle pricing strategy and calendar management.

To determine if the expense should be classified as a capital improvement or a deductible repair, the context of the expense is very important.An example is, if an item of expenditure is part of a general plan of modernization, renovation or rehabilitation to equipment or other business property, it typically must be capitalized even though on its own it would be currently deductible.According to IRS Code, expenses that you must capitalize are those that:Materially increase valueSubstantially prolong useful life (including replacement of deteriorating assets)Adapt the property to a new or different useHowever, you are allowed to deduct expenses and fees for routine maintenance and repairs that help keep the property in efficient operating condition.