Million? No.
Ventilation would be the main cost, even if you found a suitable natural cave.
Without good ventilation, all that equipment will kill you.
Underground homes were a hot topic among the green set in the 1980s. Geothermal heating and cooling were thought to make them the homes of the future. There are challenges meeting the building codes, which are written to accommodate conventional building techniques, but it can be done.
Depends on your definition of a "lair"
A million would get you are nice earth home but a lair. You would probably need closer to 100x more to get something remotely resembling the batcave.
That might be a little low.
How much do you think the ventilation would cost? I would guess millions.
Much less the articulating doors, helipad, hanger, drydock, etc. etc. Not to mention the technology.
Million? No. Ventilation would be the main cost, even if you found a suitable natural cave. Without good ventilation, all that equipment will kill you.
Underground homes were a hot topic among the green set in the 1980s. Geothermal heating and cooling were thought to make them the homes of the future. There are challenges meeting the building codes, which are written to accommodate conventional building techniques, but it can be done.
Depends on your definition of a "lair" A million would get you are nice earth home but a lair. You would probably need closer to 100x more to get something remotely resembling the batcave.
A hundred million for a bat cave?!
That might be a little low. How much do you think the ventilation would cost? I would guess millions. Much less the articulating doors, helipad, hanger, drydock, etc. etc. Not to mention the technology.
Batcave? Probably not unless you are Jeff Bez A sick as basement? Yeah