I'm in a somewhat similar situation (recently paid off house, no debt other than an investment property, accumulating for FI with 5-10 years to go). It's a little difficult for me to be patient in this stage. My struggle is thinking too much about what I want the future to look like and letting that be a negative because my life today isn't there yet.
What I'm trying to do is automate as much savings as possible, optimize my life and then not focus as much on the RE part of FIRE. Instead, I'm focusing on my family and enjoying my current life which is really pretty good even if it's not yet my vision of what it could be one day. Finding the balance of setting long term goals but not letting them detract from my current life is what I'm striving for.
Regarding the college savings, I'm not focused as much on savings that are definitely for college (529's, etc). Instead, I'm trying to accumulate cash that is more flexible.