Also it's a pain in the butt all kinds of special back-up withholding rules and extra reporting requirements. 

Sellers do it mainly for these reasons.1. they are upside down  2. they are in foreclosure and credit is already thrashed.3. slick talking buyer who withholds info.most if they talk to an attorney or some advisor that person will tell them not to do it.. best to just sell and get mortgage out of their name.But if the buyer is substantial enough and can prove it there are some ways that are semi safe to set this up.. but bottom line Seller has deeded away their interest and if their buyer goes sideways its a freaking mess for them..

Can I just submit a 4th quarter 941 showing my salary and pay the necessary withholdings through the voucher? 

Account ClosedThere are added complications when there are foreigners wanting to invest in the US.Do they need an ITIN.Will the entity you have setup in the US be taxed differently for them in their countryIs there a Tax treaty between the US and their countryWill the income be considered ECI(effectively connected income) or FDAP(Fixed Determinable Annual Periodic)Will there if FIRPTA tax considerations on the saleWill there be withholding requirements on an annual basis on their incomeWill the foreigners be required to file a US tax return

The exemption explicitly states “leasing” rather than “licensing”; this distinction is important for lodging such as short term rentals, which are required to pay this tax even if you own three or fewer units.NM Compensating Tax - I believe I fall under the same exemption as the Gross Receipts tax exemption, so I think I'm exemptNM Wage Withholding Tax - I do not have any employees, so I think I’m exemptNM Worker's Compensation Tax - I do not have any employees, so I think I'm exemptNM Corporate Income and Franchise Tax - I do not have a corporation, so I think I'm exemptBernalillo Property Tax - I need to pay this taxBernalillo Business Personal Property Tax - my rentals are residential, rather than commercial, so I believe I’m exemptABQ Hospitality Tax - I lease for longer than “at least 30 consecutive days”, so I think I’m exemptABQ Lodger’s Tax - I lease for longer than “at least 30 consecutive days”, so I think I’m exemptAm I forgetting other taxes?

Plus, they have more generous coaches that won't withhold info or treat you like you're second class because you're a noob.

For example, let's assume my day job satisfies my social security tax and the wholesaling business does the following:Makes a 100k profitPays me a salary of 50kPays medicare tax on this employer and employeeThe 50k profit would get taxed via a k-1 and be subject to federal and CA tax but not medicare tax.Same as above without the S-election:I pay federal/CA/medicare tax on the 100k profitConclusion: The S-election saves me 1,500 in tax (3%* 50k) then I have the cost of preparing the S-Corp tax return 1k-2k (i live in SF) and I would have to pay ADP or another payroll provider to handle my paychecks/withholding W-2 etc that is another 1k or so. 

They stated they waited several days before telling me and this has been a ongoing situation for 6 months and they had to evacuate the property due to feeling sick and it being unsafe and they are legally allowed to withhold rent from me.

Who handles payroll and tax withholding?

If you withhold information on a 1003 Loan Application it is fraud by deceit (a lie) and actually a Federal Crime.