The landlord side of it is the murkiest imo. You having a military pension doesn't mean you're in the bourgeoisie, it just means you're getting paid for having given time from your life. Similarly, selling the surplus from your own agriculture doesn't place you in the class of controlling capital because you aren't using others' labor; you're creating something through your labor and when faced with having a surplus, are distributing your goods. Yes you sell them, but it's not fair to criticize you for trying to offset your costs while living under a capitalist system so long as the price isn't exorbitant.

Imo being a landlord is usually the scummiest, but if you're charging rent at a price set to maintain the buildings and ensure that your tenants still have housing, then I don't think you're exploiting anyone. Imo the more profit you take from your rental properties, the more it moves out of the grey area. It sounds however like you don't take profit or take a very minimal amount, and that you price your property so that it's self sufficient but not much more. In that case then you aren't really exploiting your tenants. Are they still being exploited? Yes, by the system that forces them to pay for housing. Do you have a hand in that exploitation purely by being their landlord? Yes, however if you aren't trying to extort them for money so they have housing, then I wouldn't say you're exploiting them more than just owning their housing. Theres a reason that leftists tout that theres no ethical consumption under capitalism; even in trying to help people or do the right thing, you are still feeding into a system of exploitation and extortion. That doesn't mean you still aren't trying to do the right thing or be genuinely helpful, it just means that unless we find an alternative system then we will all continue to exploit each other and be exploited. This is why the proletariat must be unified as otherwise, we will never shake the binds of our collective oppression.