Be careful tho about online platforms for rent mgmt/websites. Online booking platforms/pure-play providers usually lock you in to their solutions which often include poor performing, but included "free" websites (Technical SEO, to name one main issue).
These "all in one" platforms simply cant afford to set up and tune good-performing SEO for every customer, so building your own SS site and optimizing the SEO gives you more control over how good (or bad) your google search visibility is. Run a SEM-rush or Ubersuggest scan on a random site built with one of these "all in one" platforms and you'll see what I mean.
My main go-to for building payment systems for prop mgmt sites is 1) integrate Stripe (with subscriptions for recurring rent payments) or 2) customizing a solution like ECWID (https://www.ecwid.com/) that allows digital subscription items you can use for rent, etc.
As well, my own company www.myownmls.com offers Squarespace plugins for property management. The OOTB plans don't come with payment, but we have quickly built custom solutions into our app and website plugin for taking payments using the solutions I mentioned above, so I know it works.
So as not to violate SS policies, iIm alerting that I am associated with this company/offering, but I'm in no way pushing you to sign up. Just pointing out a real and viable tool that could help if/when configured with 3rd party payment providers who offer recurring as well as one-time payments.