I disagree on the taxes. I mean, or isn't law so whatever, but I think the president should be transparent. And I don't recall any president being called out for any tax fraud in the past. At a minimum though they should have to do the same financial disclosure Congress does.
Term limits are a red herring.
You probably think (I'm assuming, yes I know what that makes me) that the money and influence that lobbyists have in DC is bribes and money funneled to family members, but you are mostly wrong. Thats the sort of thing that gets noticed especially in this modern age.
https://www.opensecrets.org/news/2019/02/state-of-money-in-politics-the-price-of-victory-is-steep/ This just breaks down some of the costs.
The average cost of a successful campaign in 2012 was $1,689,580 for the house and $10,476,451 for the Senate. Some were less, some were more. But the point is unless you have a grass roots movement of individuals funding you, are already rich, or have big donors you can't win. So the influence isn't bribes. It's 'do what I want or I'll fund someone else'. I'm not saying they are all clean and good, but I think most of them are there to do what they think is right. But with the understanding that it isn't just the voters with the power to fire them. That's actually more insidious in my mind than pure bribery. It is systemic. They need to cap funding period.
My point is term limits would be like Nascar changing drivers every year - the owners//sponsors would remain the same.
I'm not particularly tied to size one way or the other, but there would need to be some sort of fillabuster reform among other rules changes. With 11000 representatives, everything would take forever.