Hi John, sorry for the delay responding.
Yes it can be a good payer when you look at the hourly rate your charging out at but the problem is "getting enough sausages through the machine"
We are well known in our 'local patch' therefore we get used by councils, prisons, police etc but we don't have a dedicated team sitting waiting for the phone to ring as there just isn't enough work to warrant it.
What we do is offer a real 24/365 service. Have a hefty call out charge and always carry through 100% on the job. Once people like the police / prisons etc know that they can always rely on you, the work comes through steadily.
It's not just blood and guts stuff cleaning after accidents and murders either. We have found it has developed into cleaning up after dirty protests ( prisoners redecorating their cells with faeces) , being used by social services to clean their customers homes once a year ( you wouldn't believe how many people there are who collect rubbish and store it in their homes till it's stacked to the ceilings with tiny walkways through)
We look for a call out charge of £80 - £100 then a minimum of £50 per hour M-F daytime plus 25-50% for weekends and nights plus disbursements - Tyveks, masks, waste disposal etc are all very expensive and have to be covered properly.
Please note my earlier comments though. Doing this type of work takes a certain type of person. Blood from someone going through a glass door wobbles like a blackcurrant jelly on your shovel, picking up bits of flesh then finding a whole finger with a ring still on it, cleaning blood splashes from every surface in a ships cabin when someone has slashed their wrists then decided to be tidy about it and get into the shower but not made it etc etc are ........... very wearing to say the least.
At the same time, niche markets are where it's best to be at as a business. Good luck. Phil D