You strike me as someone who would have written a hit piece on Marx for profiting from British imperialism and his capitalist buddy Engels

I don’t why you’d have that impression, but you guessed wrong.

Can someone be a landlord and a communist at the same time?

It’s a red flag. At the highest level this boils down to whether that someone is consistently a traitor to their class.

In my estimation Engels was consistent.

his drinking habits to make clear that he is an immature mind

How are you deciding I would think anything like that from what little you know about me? Very strange assumptions.