Depending on the state, when someone rents for a certain amount of time, usually 30 days or more, they become long term tenants in the eyes of the law, and they acquire "tenant's rights". 

If politicians have them , you’re usually ok , too.

My experience is the min is around 15%, but I've read some posts on BP that some lenders can offer a lower minimum (but that usually means a higher interest rate).

Would need to know a bit more before giving a specific direction but it is usually best to hang on to your property and not sell whether you expand on it or rent it out and purchase a bigger property.  

Most sellers only care if you close so you can usually use another form of capital stack other than what is on the agreement, however, the seller can force you to use the originally agreed-upon payment method. 

A 2 +1 is a legal 2-family with a boarder unit that can be lived in by the owner, usually without a stove and you want to make sure the bathroom is permitted.I hope that helps.

if your loan is 154k  then this prop probably appraised for loan purposes at 200k or so. and that price point is usually in a decent area or street..

I know they have a cap at 10.We have also looked at using local banks in the area but those terms are usually 3 years arms to ten year arms and 20 year loans so it lowers cash flow significantly. 

We do inspections on every deal and make realistic offers that are usually low. 

I have pretty good tenants so I usually get paid so I don't worry too much about it!