Property Web Template allowing customisation for API

Hi, I require to create a web front-end which communicates with an existing REST api. I found a few real estate templates but unsure if they can be modified easily to work with API’s.
A lot of the templates have keywords such as wordpress, bootstrap… but I’m unsure what t filter or look for to allow my requirement with ease.
I want to create a property front end using css framework such as bootstrap, HTML5 and can use Javascript or react, but prefer the former. (also require PSD’s)
Additionally, I need to create user dashboards. Any assistance with letting me know what type of template I should be searching for (or tutorials in how to connect with API) would help. Thanks