Revolving LOC for 30-60 days? You or your client don't know what you are asking for.
LOC that high dollar amount would be tied directly to AR. LOC term would be for longer than 30 or 60 days. These larger LOC can sometimes take up to 30 days to set up.

If he really only wants the money for 30 days which is odd best to get a cash advance.
If collecting on AR bumped up another 30 days he would be best to look at factoring as most ABL guys dont even consider medical AR>

We have funded these before. GOod luck