Back in the day, late 90’s my first purchase was a combo loan of an interest only ARM (interest rates were high then) at 80% LTV with a second loan loan for another 15% (I think this one was an ARM or fixed, don’t remember) and 5% cash down.  

However, that won't work for several reasons:  1) The lender is not going to finance the $15k assignment fee2) The lender isn't going to consider the purchase price in this example to be $150k, they would typically use the $135k price in the original contract, and 3) In this particular example they may not even use the $135k price because it's not an arms-length transaction since it ultimately boils down to a deal between you and your father.I applaud you for trying to be creative, but ultimately what you're proposing isn't going to work and it's going to make the transaction a lot more complicated than it needs to be.

Example - Answering critical questionsYou must answer critical questions from guests in accordance with the timeline below:5+ days pre-stay: answer within 24 hours2 - 4 days pre-stay: answer within 12 hoursOn the guest’s check-in day and during their stay: answer within 1 hour (for messages received between 8 am and 9 pm in the property’s time zone).Examples of critical questions include; access instructions, arrival concerns, missing or broken key amenities, health and safety concerns, property location, outages, weapons, accessibility, and service animals.Note: You must provide a resolution to the specific issue or inform the guest when it will be resolved.

For instance, Choose Chicago (I used to work for them) is the marketing arm for the city and they drive huge pieces of business that will drive hundreds of people into downtown selling out all the hotels and driving prices crazy high.

Arlington managed to defend its STR regulations in court by carefully gathering concrete data and framing its regulations around public safety concerns.

The increases are not strictly about creating more profit for a Landlord, but rather more often than not, they are necessary to keep a property in good condition (including good financial condition), meet safety standards, and ensure a comfortable living environment. 

And 1/3 of the mortgages were ARMs back then that reset high.

Use cash flow to pay personal bills (wife is pregnant and I want a safety net).Mid term: 4-10 residential properties over the next 3-5 years as capital allows.

The jurisdiction of its a safety hazard or blight my require it to be demolished and you do not want to start getting fined for it, so that is something I would consider.

Every county has different requirements, such as minimum square footage for rooms; maximum number of occupants, hallway sizes (If there will be residents in wheelchairs); and safety regulations which are usually different that owner-occupied homes (for example- Interior fire sprinkler systems).  2.