One of my concern is building a business solution based on home use products. This will end up costing more in terms of maintenance and downtime.
Unless this is a personal project, on that budget, you are likely going to export a home solution into a business which is very undesirable.
Okay, that aside, l would split the site into each with a switch where APs can be connected into and serve half the area.
The two switches can be connected via a cable back to the broadband router.
What l would try to avoid is to daisy chain the access points.