Do I have to tell the seller the intention of buying a property?

[Tyler Sample]

I am inheriting a vacant lot from my grandparents and have the neighboring land owner willing to purchase it as soon as the deed is in my name. There is also a lot next to mine that I want to reach out to the owner and give him a cash offer but do not want to directly let him know I will be wholesaling both lots once I have them. I am a realtor in Texas so my question is, is it illegal for me to give a cash offer for the lot next to mine and tell him I am buying it for a different purpose? My license is valid but I am not active.