Don't focus on a "rule of thumb" as a rookie.

Too many rules.

Whichever loan that you decide to use, the interest will be tax deductible due to interest tracing rules.

I learned about the 75% rule from BP!

The 1% rule is a simple rule which is easy to calculate and describe.The Market Analysis IS the screening rule. 

I’m not sure all of the regulations/rules to this in PA though.

I discuss every house rule. 

You don't ever want to double book and have to cancel one of them.And the guest giving a phone number in the first message like in your original post is against the rules and the guest knows it. 

There are several basic rules for a 1031 for identifying properties, timelines, and uses. 

One golden rule I follow,if it takes a long time to fix/replace when it breaks, don't buy a cheap one.Imagine, this thing breaks in the middle of your peak season and the people who can come out to rebuild are 2 weeks out....It takes at least a day or two to build something like this even if you are super skilled.