Should the tenant arrange for it and pay for it?

Hello everyone, I've done 3 buy and hold rental properties, and now I want to do flips, I need investors and I have some that have shown interest, in addition to speaking to private lenders that are willing to fund 70% of the LTV (based on the desired property)I'm seeing a lot of deals from wholesalers, but the problem is, some of them close in 2 weeks and some as long as a month, and they don't take conditional offers, and the good ones fly off the shelf really quick.My question is, how does someone like me close one of those deals within this short period, how do you arrange the equity and financing with little to no inspections sometimes even.I'd like to know how do I prepare myself to be able to close one of these good deals right away when they are offered to me and many others?

As long as the arrangement is legitimate, you'll still be able to deduct eligible expenses like property taxes and maintenance costs.In terms of accessibility modifications, such as adding ramps, these could likely be deductible as capital improvements on a rental property.

Are there any verbal agreements or arrangements between the current Landlord and Tenant?

You arrange the LLC deal so that in the waterfall, you and Sis get the majority of profits over this baseline threshhold. 

I have some experience buy and hold rental properties, and now I want to do flips, I need investors and I have some that have shown interest, in addition to speaking to private lenders that are willing to fund 70% of the LTV (based on the desired property)I'm seeing a lot of deals from wholesalers, but the problem is, some of them close in 2 weeks and some as long as a month, and they don't take conditional offers, and the good ones fly off the shelf really quick.My question is, how does someone like me close one of those deals within this short period, how do you arrange the equity and financing with little to no inspections sometimes even.I'd like to know how do I prepare myself to be able to close one of these good deals right away when they are offered to me and many others?

What you are describing is a fully thought out partnership or pre-arranged circumstance.

I've seen people create a new LLC per property, or per $X of equity, or after $Y of income since the $800 increases once you have higher amounts of income in the LLC, or any number of other arrangements (i.e., put all your best properties in 1 LLC and worst ones in another, or conversely, only put 1 good property in each LLC with 1 bad property). 

I have done this a few times myself and have a few basic recommendations:1) Make sure the seller owns the property free and clear and that it's very clear to both parties whether the arrangement involves a deed of trust or contract for deed2) If a balloon payment is involved, be sure to assess your ability to refinance and make that balloon payment in the future- optional extensions can help manage this risk3) Understand the tax implications if the interest rate is notably above or below market rates4) Get title insurance! 

I am unsure what case law there may be regarding STRs with regards to "public accommodations" versus a typical rental arrangement.