I goofed and forgot to get our oil furnace and that chimney done this year (usually every other year and I was off).

I've done the chimney before and I watched them do the furnace...a bloody filthy mess of a job, hence I usually have someone else do it.
My HVAC guy is pretty much done due to health issues, and referred companies are back logged. Guess it's up to me (got soot landing in the snow) to do it tomorrow.
I don't have the propper shop vac type filter, so just going to "sweep and scoop". That should at least tide us over until we get the propper vac and filter...which leads to my question...
Recommend a brand of vac? I know they run from $300 to $1000, but looking for a homeowner friendly version that will be used once a year and eliminate the need to call a service. I used a shop vac with really expensive filter before and came out looking like a 30's movie star in black face.
Will be using the fireplace tonight and tomorrow until done to bolster the heat. Planning for 3 hours as worst case scenario, i.e. running to city for a part if I forgot something.
Thanks in advance.
Have karate and a scout meeting this evening, so won't be back for a bit.
Matt