Hi and welcome to the helpful suggestions club!
As your grains are crushed your options are much wider, and easier.
I was in the same boat as you just over a year ago, being restricted to a four ring stove top with a casserole and assorted large saucepans for brewing.
So I am familiar with the quantity of grains, and the volume of sweet malty liquid (or 'wort' as it is known in brewing) we can get from them on that scale.
I went for small volume all-grain brews from the start, so it can be done. My brews increased from 6 to 7L (single casserole mash), to a whopping 11L using a big saucepan as well. This became rather congested when doing the scooping and rinsing of the grains (known as 'sparging') in a second, then third saucepan in rotation, ending up where I started. Hence ~3L mashing water increased with the rinse sparge water to become my total mash volume to boil with hops, then fermented.
As assumed above, you will need some sort of suitable temperature indicating thermometer to do any of this. If 66°C is around the middle of its scale, that will be perfect.
The most useful 'special equipment' I used was a 'holey spoon' .
I think it's called a 'perforated skimming ladle' or some such. It's a Prestige stainless steel one.
I don't mean 'blessed',
I mean like this:
View attachment 57754View attachment 57755View attachment 57756
You could do as
@An Ankoù and
@The-Engineer-That-Brews suggest and add your all grain wort to the commercial syrup malt kits, in place of the recommended sugar or dry malt extract to give more flavour and body to your beers.
If you then boil leaf or pellet hops in this you are making a mini all grain brew to combine with your tinned kits as in 'partial mash' brewing suggested by the people above.
Again scoop off the boiled hops and scum with the same ladle, then pour through a sieve:
View attachment 57757
Or use a net bag from a supermarket to boil them in :
View attachment 57758
Don't be overly concerned by a certain amount of crud (known as 'trub') getting through and into your fermenter.
The yeast actually need that as nutrients for healthy growth and in the fermentation process.
You do realise you will make yourself very unpopular with the regular cook in the house, occupying the hob and all the pots and pans?
That's why my family clubbed together and gave me an all-in-one brewing vessel in June as a birthday present.
Don't despair and give up , it's a learning process. You can make plans, but it's just a 'suck it and see' experience in the end that almost all of us have been through as well.
Safety warning - do take care when pouring large volumes of hot sweet malty wort around.
You don't want to splash it on you, nor waste it - you want to drink that later!
And as has been said, you'll probably end up doing all grain sooner than you thought!
Keep us posted,
531Man.