Excellent answers above. I can only add 2 things. Cash is king and if survival is the priority right now then talk to your customers and pull in as much cash owing as possible. Be open and honest about your situation as I have found most people are willing to support one another as much as possible.
The second thing is staff. Probably your team feel a little like family and you don’t want to see any of them lose their jobs. But the reality maybe that you need to let some go to ensure the business stays whole and that you have jobs for the rest. Don’t procrastinate on this. Move quickly and decisively.
All the best