I also got great value from a very expensive course on how to properly buy & manage residential real estate.Regardless of cost, the ones that offered low value were the ones where the founder wanted to sell education as their main business. 

Decide what is important to you and choose the custodian that offers it.

I would be willing to share mine as well including the sheet I built to calculate where your offer needs to be on a house hack for it to make sense.

We specifically locate ideal investment locations throughout the US that offer the best returns for cash flow, appreciation & equity.

Too risky for us.Regarding additional guest packages, you can easily change your tax situation by offering what the IRS calls "significant services".

I am seeing more lenders starting to offer manufactured home loans, that normally did not. 

Just like the asking price, just because the owner suggests one interest rate or term doesn't mean you can't offer something different. 

If the inspection reveals a bigger problem, either you can try to keep the deal alive by offering a seller credit, which could motivate the buyer to move forward, or the buyer walks away. 

Lower your offer price and move on.  

We were in Croatia for 8 days when we had the offer in and did not go to Croatia planning to buy an apartment.