So sorry to hear your news, @ayrhaven - do you have family or friends nearby to look after your husband as you recover from the surgery Re the farm - do you have animals that need caring/milking etc? I hope locals will pitch in & help you! You may be somewhat impaired for a little while after your surgery, depending on the extent of what you are having done.
You say you have family in Melbourne - are you also in/near Melbourne? We may have members nearby who may be able to put you onto local 'help groups'? If you add your town/state to your profile, others will be able to spot that & help as well.
Once you have had your surgery, I am hoping you will feel MUCH better - I know I did. Then it is just a matter of waiting for the pathology & chatting with your team re ongoing treatment. Fingers crossed your surgery goes without a hitch.
In the mean time, take comfort from others here, who have gone before you & know how you are feeling. My own husband has dementia & it is a balancing act with him, too. My surgery was just over 2 years ago - all going good now. xx
As @iserbrown says - DEEP BREATHS ..... you can do this.