Bob plans to start an indoor rock-climbing business called Bob’s Bouldering. Bob is deciding whether to install portable climbing equipment that can be easily moved from building to building or fixed equipment that, once installed, cannot be moved without destroying the equipment. The loan to buy the removable equipment will cost Bob $1,000 per month in interest, while the fixed equipment will cost $1,500 per month. However, installing the fixed equipment will generate an additional $800 per month in revenue because climbers prefer it.

He can rent a building for his shop for $5,000 per month. However, the building owner realises that if Bob installs the fixed equipment, he can raise the rent to $5,400 per month because Bob will lose his investment in the equipment if he moves to another building.

To maximise his profit, Bob will _____.