While I was out, my wife also got injured.  

I also was injured a couple of years ago in a car accident and have had a few minor surgeries with possibly more extensive ones to come.

I'm sure you already checked but in some states you can't charge additional rent for a pet.You may be able to charge a pet fee or pet security deposit, so make sure it is legal.Otherwise like you stated I would just combine them for simplicity sake.Lastly you mention "Fido" I hope you required the tenants to get "Renters Insurance" so if Fido bites someone, knocks someone over and they are injured on your property, or accidentally starts a fire that you have some protection for yourself.

What happens if one of the workers gets injured?

Also there's one episode of podcast mentioned that you should ask what insurance they have so if anyone working on your property gets injured, it is not your insurance that pay the bill.

For a few dollars per month, depending on the policy chosen, it can provide additional levels of liability and premise insurance to the tenant, it protects the tenant's possessions in case of fire, theft, natural disaster (u never know, some be storing expensive gear, clothing, bling, in my units), it insures against accidentally injuring others (including their guests) on the property, and some policies even continue paying the tenant's rent if it happens that the tenant(s) loses his/her job during their tenancy.

I feared that if I was ever injured or lost my job I'd have zero income & I didnt want that for my family, so I decided something needed to change & I took a hard look in the mirror & decided I was going to figure it out no matter what. 

Should someone become injured on the property, they could only sue and get the LLC's assets, in this case just your one rental property.  

I have no experience fixing up a house — just minor stuff like painting and fixing toilets.My current mid-term goal is to buy-and-hold enough properties to cash flow around $30,000/year so I have a net to fall back on if I'm injured and can't work.  

The risks are far more onerous than many people hear about because most people that have been injured by the process don't go around telling people about the experience.