How many Paid/Funded Accounts am I allowed to have?

There is no limit to eval accounts.

PA accounts: You can have 20 in total. That includes personal within the same household and LLC accounts regardless of address

E.g. You have an LLC with 5 PA accounts, your personal account has 10 PAs, your wife/husband/significant other can have up to 5 accounts. Totaling 20PA accounts in the same household.