My goal is to retire within the next 10 years, and I’m looking to build a strong and sustainable portfolio that will enable me to enjoy my retirement years. 

Listings come from nurturing your database for years, so if you are new, you have to pick a niche or an area that you have a competitive advantage in.

A mortgage lender can help determine if refinancing or tapping into equity might allow you to acquire additional properties.Consider a 1031 Exchange: If you're open to selling a current property, a 1031 exchange can defer capital gains taxes while enabling you to upgrade to a larger or more profitable asset.

Negotiations focused on securing the property at a favorable price, enabling us to achieve a profitable margin in a highly competitive market without requiring additional renovations.

Also If the names are correct i searched dca database and found neither license listed under the name or business. 

I remember a new wholesaler agent that didn't have any buyers, so she went to the meetup for other wholesaler companies and start building her buyer database from there. 

Perhaps a better vetting of the buyers on the BP side will enable better quality leads?

I'm passionate about real estate and how utilizing this asset class can enable me to build generational wealth and retire early.

I predict that the substantial home price cost savings and greater control they enable the buyer to have will make them grow in popularity.

Those work well and you can also get them that work off a cell phone provider; I used to have one that was US Cellular enabled.