Best solution for ovpn-client?

Question

client-server

there is a task that is not entirely correct, but at the same time quite understandable) at the moment there is 1 router in the company's network - this is Mikrotik, there is also an open source server. to hang up the client of ovpn on microt obviously not the best idea. The obvious question is, what decision should be made regarding the OVPN to the client? our options are to purchase a router and install ddwrt on it, upgrade pfsense, or purchase some ready-made boxed solution. What I would like to hear is correctly working options for solving this issue, with an explanatory comment)
Thank you all in advance!
ovpn works on the udp protocol
in an office of about 200 machines