Is it they are taking on more risk or getting less percentage when its all said and done?

What percentage of expiring leases will renew their lease each month?

Toledo housing is affordable to a much higher percentage of the work force than the average city.

Loans are typically amortized meaning the percentage of interest paid compared to principle paydown is highest at the first month. 

In Arizona there are laws that limit the percentage increase on HOA dues for planned communities to 20% per year, unless there is a majority of the HOA that votes for more than 20%.

I'm going with 2 sentences...Tax benefits are secondary to the value of the investment...The large percentage of wealth held in retirement accounts is particularly notable given the tax advantages these vehicles offer.

That plumbing bill or new appliance will generally cost the same, so higher R&M reserves, as a percentage of rent, are needed in lower quality/lower rent assets, too.

I have equity in my property which is in Washington state, and I'm interested in finding an investor who would be interested in loaning me 20k to 30k in exchange for an agreed percentage rate when the house sells (within 10 years).

To be fair, Engelo did say cap rates would probably be a couple percentage points below what he advertised through his frequent marketing emails.

The scenario you described is akin to playing the role of a lender and paying yourself the loan percentage—investors pay themselves much like how a bank or private hard money lending institution would handle it.