What is the cost of demolition of some or all of it?

You can use 75% of a lease or all of your income from a tax filing to reduce or eliminate the mortgage on your DTI on that first property.

Within the applicable redemptive period, the tax sale purchaser may send a written notice to any or all tax sale parties notifying the parties of the sale.

-----Number 3 would be ideal if I can sell it for enough to pay off the majority or all of my HELOC.

These platforms typically have billing policies where you pay a per unit fee per month to the software and you get regular updates and support each month.There are also a number of newer low-cost platforms available that are able to offer you a lower price by passing along some or all of the costs to your tenants (payment processing fees, applications, tenant screening, etc).

If you purchase a property in California through a tax deed sale and you win the bid....are you responsible for any or all mortgage on the property?

Generally I see IRS liens recorded on specific property's and/or all property's the debtor owns. 

Sometimes it is also easy, and inexpensive to replace some or all of the 1st floor knob and tube circuits if they are easily accessible from the basement. 

Ever broker will tell you they have training, but for some that is self paced, or a book, or all online...and you have to determine if that is the right resource for you.I also recommend you attend a sales meeting and a training class. 

@Brittney Cain I own a triplex in PA but I’m not sure if it’s legal or not to ban 1 or all quests.