Sounds like the velocity banking stuff that was popular for a while.

You are likely overpaying by $5,000.Broker fee of $3,000 and Processing Fees of $2,000 seem out of place...but then again, i never used a broker to get a loan so I am not sure about that.If the broker was able to get you an interest rate or loan product that you wouldn't be able to find on the open market...its high, but likely fair.if you are getting a loan product that you could have gotten by going to a normal bank...seems high and unnecessary. 

Short Sales, Bank Owned, $/sqft, school district, days on market, etc.  

Each multifamily building I have has its own bank account.

Many banks handling tax escrow accounts for mortgages have mistakenly thought there was one tax due twice/year or totally missed one of the taxes.Investors should research the SEV and the Non-Homestead property tax millage rates to project what the property taxes will be after adjustment.

I'm an investor and co-host in Dallas, TX--- and that's where I live. 

What does my purchase price and down payment need to look like for the bank to provide financing? 

Are there investors here in Texas that have utilized and would recommend banks they hold series LLC accounts with? 

But basically with a construction loan you will need to have considerable cash involved - most costs need to be paid for and then the bank will reimburse at certain checkpoints.You may want to start with some smaller value adds inside the existing house to maximize rent from the house hack. 

It may create a problem for you later if your bank discovers the account is owned by an LLC that no longer exists.