Need advice on Harman magnafire insert water coil set up

I have a harman magna fire insert and have been considering
Installing water coil in it, however here's my situation
Insert is on concrete slab (first floor) and I would have to bust up
About 4 foot of floor to access wall where I can run plumbing
One option to that would be to run plumbing up along chimney
And into ceiling and complete the run to either baseboard plumbing
Of seperate holding tank in attached garage then tie into baseboard
Plumbing ?
will this work if i route plumbing from stove through
Floor to baseboard or up to ceiling and across to attached garage
Storage tank ?
Can I use the baseboard plumbing to bring hot water from stove
Oil fired oil burner ?
( I have oil fired boiler for heat and a seperate oil fired hot water heater )
Any and all suggestions would be greatly appreciated
Thanks

I looked in to a hot water set up, and what all I would have to do.
I came to the conclusion that unless you can just set the water tank next to the stove with pipes to and from the stove its probably not worth the money and trouble to install.

How big would this holding tank have to be and can that be
Plumbed into baseboard ?
If I had to I could put a 20- gallon tank behind the stove
Thanks

How big it you current water heater? I would start there. Also how much room do you have in the stove for a coil?

The larger the tank the longer it will take to heat up.

The larger the coil the faster you can pull heat from the stove.

You will want to size your coil and tank together or else you will either be poping the temp. valve or never have hot water.

Were you wanting to have a thermo loop or have a pump?

The current water heater is about 30 gallons ( will have to double ck)
Ideally I would like to do a thermal loop but unsure if it would work
Since hot water heater and oil burner for heat is in basement and stove
Is on main floor ?