I was pre-approved for a conventional mortgage with a 3 % down payment 2.75 Interest Rate.

Get pre-approved through them and then start sending them deals!

The gentleman Chris Koerner seemed well educated on the topic (mobile home park investing) and he gave enough information and follow-up documents that you could take the information and run.

Are you completing these renovations with all appropriate permits and approvals?

Do you have an approval or is something even grandfathered in that would allow you to put up a billboard? 

An illegal unit was never legal per zoning/ building codes, and cannot be occupied without city approval. 

For example, hotels or short-term rental properties like Airbnb often generate more income than traditional apartments, especially if the location supports it.Entitlements and Approvals: Check whether your project fits within the land’s current zoning (by-right uses) or if it will require variances or rezoning.

Either they get approved through the website, or they have to pay the fees. 

I ended the offer to rent to the tenant on December 1st and didn't receive any communication from LMHA until December 15th when they tried to schedule the inspection...that's 45 days to process a voucher.We had another home pass inspection on November 5th and we hadn't "stopped and waited" for LMHA because it had never been a major issue before so we let the tenant move in...LMHA announced on November 15th that the tenant voucher needed to be re-evaluated by LMHA and that the rent rate needed to be adjusted (The story was the "Administrator A" reviewed and approved it but since they had resigned, now we had to wait for "Administrator B" to do it.

And just because another developer got approved for a certain style project near by doesn't mean you will.