i am saleing a web API that i designed myself. my WebAPI is scope that onion architecture, microservice, repository, unitofwork, good generic persistence, logging, multi language, multi database, Excel Export, Cache, Notification, Money desing pattern, IoC containers...ets.
Generic Persistence have a lot of functions like server side pagging, stored procedure call, filters for all field entity class, count...ets.
i can saleing you to this Web API even only 250 $.
if you want i can help you back and for your mvc, web api project but i can not help about front end.