I'm a beginner and I'm looking for tips on how to perform a proper market analysis on houses to buy and hold long term and rent out.Right now I'm looking through all the MLS websites and finding properties in locations and within my price range.

You can build a list of target properties, call those owners, follow-up long-term and be there to buy or help them sell when the opportunity presents itself.

But he did take a loss that set his family back quite a bit, caused a lot of stress in his marriage, prevented them from being able to buy the new home his wife wanted with the right number of bedrooms for his kids, set him back years in saving for retirement and buying investment properties that could have made him money instead of losing money, etc.

Maybe find a good designer that can provide services to install and setup the spaces.A lot of these ideas are going to depend on where you are buying.

As long as the lender can finance in the state that you want to buy in, then work with them.

I was buying an RV, and she said I didn't qualify because of my income.  

We didn't do any major renovations since buying and renting it out, but Redfin tells us that we gained ~$60k of equity.

You could buy a distressed deal, add some value (as a team), and refinance when interest rates are more favorable. 

Am I buying it after it's been renovated and rents have been raised?

It can run buy, arbitrage, and co-host scenarios very quickly and easily.