An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.

Thus I do not see what benefit there is investing as a LP with a LLC

Not many people want to believe in holding onto something for a long time and seeing the benefit of it only 10-15 maybe 20 years down the line.

We would only plan to manage our own properties.Would there be any tax advantages, or any other benefits, to starting our own property management company?

if you aren't will to or don't want to go into those types of areas, but by all means the FHA or 5% down conventional 2-4 unit loan is gonna be the way to go in my opinion.We did a house hack as our first move into reale state investing and it was the best thing we ever did and continues to expand ints benefits to us every year, So I am a huge fan of the strategy. 

@Nathan Gesner what is the benefit of the double deposit rather than collecting last month's rent + a single deposit? 

You can have for example a 6 months contract, extendable, as you are not covered by long-term rental rules (neither "benefits").

One portfolio gives me cash flow and debt pay down, while the other produces appreciation in addition to the other benefits.  

We offer products with fixed-rate HELOCs that give you the benefits of both worlds. :) Available for primary homes, second homes and investment properties.

Explain why you need them to vacate the property and the benefits of accepting cash for keys, such as avoiding the eviction process and potentially receiving a financial incentive to help with moving expenses.