If all units are residential 2-bedrooms rents could be around 1300/month.ARV as a 4-family around 450k-500k, but there are not a lot of comparable from the past two years sold.I wouldn't be able to finalize how many units/uses I would put in until I know how I would refinance. 

This property cash flow to current value is not great (because its value is so high) but the cash flow compared to purchase cost places this as our best purchase. 

That way we can compare what the selling landlord is telling us to what the tenant has to say about lease terms and catch inconsistencies before closing. 

Starting my investing business has afforded me the ability to help others in ways I could have never imagined prior to starting this journey. 

For your specific question....any mtg in place prior to the mechanics lien being filed most certainly remains attached to the property.

Also I have 10k for a down payment, the house is only 50k and comparable homes in the neighborhood that are in decent shape but need an update are selling for 100-140k so it would be a great investment but I’m looking forward to hearing some insight from people with experience in this sort of thing.

It worked well for me because I was a busy running a business and my local market was not good for passive cash flowing REI, as prices were too high compared to rents.Yes you do own the property. 

New construction may seem like a better bargain than a 30-year-old structure customized by a prior tenant.6.

The 1031 process starts with the sale of your old property and a qualified intermediary must be in place prior to the sale to document and hold funds.  

We found a property management company but before signing the contract, noticed that they put "owner to pay $395 to secure lease renewal of current tenant""owner to pay 8% per month but subject to $100 a month minimum payment" of gross revenues DUE (not paid) prior to monthly disbursements""if premises are vacant at any time during this agreement, then owner shall pay manager $100 per month for management of premises including supervision of maintenance"It doesn't seem like these terms fit for managing our simple duplex rental.