but I am way out of my league with electric work.  

Are there any Bigger Pockets meetups in Galveston County or League City area?

I'm not in your league yet, but I'm taking baby steps!

The time involved is extensive and this is time where you make $0, tick off your client who was previously your champion and the negotiations over the problemtake you away from moving on to the next deal. 

Straight up a $1.5mm deal is WAY out of any beginner’s league.  

They make it sound highly selective, like they "only take" a certain type of investor who's going to be good for their prestige, as if this is an Ivy league school or something.

Some things that work well for us areDirect mailSocial Media (Facebook, IG, BP, Twitter)Neighborhood exposure (Yard Signs, Cars, Trucks, Billboards)NetworkingCommunity involvement (sponsoring little league teams, 5k's etc)Google ad words

I like to think that it weeds out some of the big league investors.

Merely tell the party that hosed you (if they really did) that;"If this is not rectified within 5 business days I will make it a point to tell EVERYONE how you failed to handle the situation; this includes people I meet; at church, at Little League, at PTA, at Lodge, in line at Starbucks or the grocery, at the bus stop, on forums at our local community bulletin board.

I am getting my texas real estate sales person license, looking for broker sponsorship.I have found couple of broker sponsorship online, such as champion, Texas home realty, they all have yearly membership and per transaction fee by tier.