I am a single individual, no dependents, only live and work in PA.

Single-family homes and small multifamily properties (duplexes, triplexes) are solid options depending on your goals.

It really depends.

It depends on your financial strength, the quality of the property, how many properties you own, etc.I like to start with one significant expense and three months of vacancy.

I would still do due diligence such as whole property inspection, lead inspection (depending on when the property was built), appraisal, etc. 

Now as I stated I'm not a agent but I do feel confident in this here friend. 

We then will either sell or keep it as a STR depending on what makes more sense for us. 

Cash flow is crucial, especially if you depend on it for your monthly income.Selling the property for $170k, which is above its market value of $120k, might seem like a good deal initially.

I think you can go as high as 15% but it's cutting into your margins and depends if you are a GC yourself or not. 150k is close to a million or more.

If you building 2 , again depending on your lot size and projected finishes.