Just go to Lowe's and buy one or two 100lb propane tanks. Much more cost effective.
I assume you have gen or solar as the furnace will run often and blower will consume elec.
Also installing wood stove and accompanying chimney and air intake will make your rig virtually unsaleable in the future.
I've heated with wood at home for decades and can't see it as practical in a fiver.
We currently winter in ours and temps in NW Ga often go below freezing. We have done fine with one 100lb tank although we have shore power.
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, Residential Refer