Everybody’s different obviously, But I’d probably go to 40g to start, it’s not a huge amount or high carb by any means, but it’s also enough that if the low carb is screwing with you it MAY show a difference. I’'ve been at 30-40g most days since I started lifting heavy and have seen no difference as far as backfire from raising them. The farm work will have you burning a lot of that as energy before fat storage becomes an issue.
That work WOULD be pretty descent for somebody that never does it… But if that’s completely normal for you which I’d assume it is, unfortunate it’s probably NOT giving you any benefit (as far as being a workout). Our bodies adapt to physical activity very quickly. During the decade when I put on my extra hundred I worked for the cable company, over 100lb ladder on and off the truck, walking around with it a bazillion times a day, 40lb tool belt on, up down all day, carrying equipment up 3,4,5,6 flights of stairs (lots of walk ups in my area) at most stops, it was just normal, none of it did anything for me anymore.