Don't know what state you are in? In California, landlords only have to reimburse tenants for the actual daily rate the tenant pays, regardless of the reason the tenant does not have access to their rental unit. If your rent is $900 per month, then divide that by 30 days and the landlord only has to pay you $30 per day. He does not have to pay the extra cost for a hotel and he does not have to pay you any allowance for meals or transportation. Just the $30 per day, or whatever your daily rate is.
I am a landlord and when mold is found in inside a residence the first thing I am concerned with is where the mold came from and who should pay the cost for remediation. In most cases, the tenant caused the mold by not keeping the unit clean, or by not ventilating the unit to reduce moisture. I am also a certified mold remediation contractor, a general contractor and I deal with mold almost every day.
The reason I blame most mold problems on tenants is because I am fairly certain that no mold was present when the tenant move in. There are 50 types of mold in the air 24/7 everywhere both inside residences and outside. It takes specific conditions for the mold to thrive i.e. not keeping a rental unit clean, not cleaning around showers, bathtubs and the tops of all plumbing fixtures. Tenants seldom care about turning on bathroom fans to get moisture out when showering, nor do they open windows when there is no fan. One major cause of mold growth in rental units is caused by dirty laundry all over the place.
As stated, when one of my tenants mentions the word mold I terminate their tenancy and if you are concerned about mold then I suggest that you move out because as I just stated their is always 50 types of mold in the air everywhere and something (maybe, you did) caused the mold to thrive. Either way, your best option so that you don't have to worry about the mold coming back is you should move out.
One important thing people don't realize is that it is 100% impossible to remove mold growth from inside a home. The remediation company will remove the exposed mold they have access to, but they leave every bit of mold that is between the cracks where lumber is attached to members. Guess what? The mold is still there waiting for the same conditions that caused it to thrive.
I am going to tell you one more thing about mold and everyone is going to say I am crazy. About 5 years ago there was two separate lawsuits in two separate states where tenants were suing their landlords because they said they were injured by toxic mold. The judges in both cases ruled that mold is not harmful to humans in any way. Mold was put on this earth to eat up all the cellulose materials, leaves and wood and if we did not have mold the world would probably be covered more wood and leaves more than 1,000 miles deep.
I have a clause in my rental contract (lease) that states something like; "Tenant has inspected rental unit and verifies that no visible mold is present. Tenant agrees to inspect rental unit for mold growth every 30 days and should mold grown become visible Tenant agrees to vacant rental unit, immediately, without any delay, at Tenant's expense and Landlord will reimburse Tenant any unused rent payment and Security Deposit minus costs for any damages caused by Tenant. Landlord will not be liable for any damages to personal property or illness caused by mold growth. To protection from mold related health issues and damages, Tenant should purchase a Renter's Insurance policy and consult with their physician.