I don't think there's anything about the 1031 itself that makes the loan process more difficult.  I

The Series LLC is an entity that was created for investors who were scaling up and having difficulty keeping up with creating and maintaining multiple traditional LLCs.

It wasn't a flip, however (at least not a successful one); my research revealed he took out a mortgage for 93K, and got a terrible rate (12%), and is having difficulty meeting the payment--with my offer as it stands, he'll just break even after commissions.

I'm having difficulty finding properties to buy (trying to acquire rental properties), so I'm exploring all my options.

If it is, the estate/trust may well be having difficulty vacating the occupied unit.

I've never denied anyone because of the difficulty of using the Work Number.

I let the original agreement lapse after three renewals, due to initial difficulty in getting the finances together.

Increased difficulty of managing tenants and greater delinquency rates from these undesirable tenant will push the kind hearted hobby landlords to the brink of bankruptcy.

I have been running into difficulty obtaining the tax lien list here as well.   

Yes bats are difficult, I had this same issue with 2 different houses in Minnesota and I spent about $600 on each one for the same process you described.