@Sunny Malik, for a 1031 exchange you have to use the services of a Qualified Intermediary. 

It must be disclosed that your broker is a intermediary if they are representing the seller as well. 

I'm with the others on a 1031 sale (happy to recommend an AWESOME Exchange Intermediary if needed)

I used to work for a leasing platform (HomeSuite) and we worked as an intermediary to the transaction so we never had to worry about that.

Also, check with your 1031 Intermediary about a reverse exchange.

This could have caused a short delay but mostly it was an agreement that we didn't make buyer incur extra fees related to 1031 and that they would sign additional forms and actually sell to the intermediary etc.

Kevin You should likely seek out a mortgage broker (an intermediary who works with lots of types of lenders) that can present you options for the different loan types (conventional, DSCR, bank/credit union, etc.) 

They use me to be the intermediary and I don't always take a percentage but a flat fee for the transaction. 

I am a CRE and Business broker; What you are describing is a risk concern for one party in a business sale (you as landlord), usually landlords are worried on of the opposite, making sure a tenant will stay/succeed.As the landlord, you will want to underwrite the lease transfer as you would any similar deal, and the broker should be working with you and all the parties to facilitate.Working as an intermediary capacity  (what you describe as both sides) is typical in BB; That is why business brokerage(s) charge more than CRE brokers, it is a less common skillset.External influences or unconfirmed competitive businesses might not be required disclosure in your state and your injecting accusations about the sellers motives might be interfering with a business contract (ask legal counsel if you can be held liable) or might violate your agreement or any NDA or confidentiality agreement you have with the tenant. 

A reverse exchange would allow that since we as the intermediary form a holding entity and take title to the new lot and hold it while construction goes on.