[bleepblorp]

I suspect one of the largest problems with converting an airliner into a house would be getting the legal permission to do it.

Obviously, the fact that it has been done means that it is legally possible in some jurisdictions, but it's likely to be an uphill battle--or completely impossible--elsewhere.

Communities that require newly constructed buildings to match the character of the neighborhood likely would never grant permission for an airliner house. Jurisdictions that don't have this requirement would still require building code compliance, which could be extremely difficult to achieve as the technical standards used in aviation are not comparable to those used in conventional construction or mobile homes. At minimum, you'd have major issues with insulation requirements, fire resistance, and emergency egress.

After all of this, you'd still need to find a bank willing to issue a construction loan/mortgage, and an insurer willing to cover the finished product.

$300K might be a very low-end estimate of the costs involved to make everything physically and legally proper.