We normally do open houses.

I assume you could still qualify for a 150k fourplex with a normal job.

I charge a refundable deposit equal to one month of rent and I charge a mandatory cleaning fee of $100 per bedroom and bathroom ($500 on a 3bed/2bath).I have a company right now that is paying $2,200 a month for a single-family home that normally would rent for $1,200.

I'd mostly use these ideas in other cities that I don't work in, going through normal channels.

This depends on your personal investment philosophy and/or what gurus you follow.For example, many in the FI community would say you should not mix your 401k (normally equities investments) with real estate investments because the diversification you get by investing in the equities market and the real estate market are a boon. 

I understand that but when I’m being charged 150$ for each question is that normal?

For this reason I was considering reducing our contributions down to the bare minimum this year, and putting the money I would normally contribute aside for a rental investment.

Would you normally rent the house without a washer and dryer at a certain price and then give the option of delivering and installing them for $20 a month, as an example?

I just have nothing to compare agains so I have no idea if this is a normal premium or not.

Normally you can go to list source and pay for a list of addresses that match criteria, but Idaho is one of very few states were data isn't public.