Do I require the tenants to submit a new application after purchase?

Takes a little while getting used to submit documents gor signing and paying rush fees for contracts, closing documents.

Here's a link to resources available through Baltimore City:https://www.bmorechildren.com/eviction-preventionLandlords can submit contact information for tenants with past due balances.

Logan brings up a good point in that, you should definitely connect to a hard-money lender, as they provide an avenue to submit a cash offer, and you can refi after you close and renovate. 

Make sure to submit property inspection report to the property manager before attempting to find a tenant.

But you should find another agent and get your offer submitted.

We've submitted many support tickets over the years and typically we are met with quick responses. 

and I’ve submitted for pre-approval from a local lender that was recommended.

Your realtor will likely need to submit a lot of offers before one gets accepted - some realtors don't want the hassle of dealing with investors. 

Once the full package is submitted we are at the mercy of the lender.