A knowledgeable, reputable mortgage banker is worth way more then the few bucks you might have saved going with the lowers rate.

Any recommendations on a reputable realtor in Miami who is familiar with condo associations that will allow short term rentals in a good investment area ?

He is looking for a reputable, low fee, custodian company for self directed ira's to use for these projects. 

Became an immigrant 4 years ago... spent 2 years in Forest Grove, Oregon and moved here in Dallas a year and a half ago for a job. 17 years experience in electronics manufacturing but zero experience in real estate.

The Barrie area has a reputation for bad tenants and as such I would advise you steer away from SFH investing.

Does the company managing the HOA have a good reputation?

I've tried close to 20 others, even our small town local banks but they no longer would consider pre '76 manufactured homes whereas Becky and First Union were willing.Good luck

As this is my first manufactured purchase, I'm curious whether purchasing manufactured home requires HUD settlement for closing? 

I used a reputable AC dealer.

I am not aware of any reputable ones around RVA/VA though.