I'm 32, with a Math background and just wrapped up my first semester of PT school. For me, getting my pre-reqs meant I spent a solid year at a community college getting in a bunch of things. If it hadn't been for some psych electives as an undergrad, I probably would have had to delay my plans for another year.
Getting in pre-reqs is a pain. One of the most difficult aspects is just coming up with a plan that will work for you and the programs you wish to apply to. Every program seems a little bit different. What will work for some won't work for others, so get ready for spreadsheets galore trying to keep track of everything....
And make sure you get someone at your target programs to view and sign off on your pre-reqs early on. So many people get their applications tossed in the trash because they don't meet the requirements, so make sure you get something in writing confirming that you're good to go.
Also, you may see the long timeline to starting school as a major disadvantage, but consider the upside: you can put yourself in a better financial situation by socking away money or establishing residency in a state with low cost schools. I moved to re-establish residency in my home state where schools and cost of living were cheaper (I was able to live off savings during that time, which helped tremendously). My year spent doing pre-reqs allowed me to get instate tuition and is saving me quite a bit. .
Bottom line: if this is the route you're going to take, there is a lot of work ahead, but it sounds like you have some pretty strong advantages working for you. Best of Luck!