But, just about every brick and mortar brokerage that i heard of needs agents to sit the desk and answer phones. 

We provide the residents with a list of names and phone numbers in advance, and warn the buyers NOT to arrive early OR stay past the end of the viewing.At the end of the viewing, our resident gets their e-gift certificate immediately by email or text.They are usually delighted and often ask us when they can host another!

I went searching for her and I barely got anything I found the sister that signed her rights over but she didn’t know her whereabouts a phone number or anything and it seemed like they don’t stay in touch cause this lady didn’t have anything for me and she knew who I was and remembered the transaction but no info on her sister.

Furthermore, the only way I can pay him is giving him my credit card info over the phone....he has no online payment portal.I still owe him for the inspection ($435) and am hesitant to hire another inspector right now.

Using a phone or table for everything is not always the most efficient method. 

On a somewhat related note, I would refrain from contacting these tenants by texts, phone calls, or voicemail for these kinds of issues.

Picking up the phone and discussing with them is best when you have a specific property to discuss, otherwise their website has good general information. 

Sometimes to this day if I have a CRE deal that I know will work but I don't have the relationship in pocket, I'll bang the phones until I find the right lender - banks/CU's/calling lenders I do have and asking for referrals/etc. 

You might be able to get contractors over there or atleast give you a phone quote if you can be specific there.  

I have multiple sets of apartments and an I phone.