Will landlord insurance be good enough or will I need one or all of the following:1) Dwelling policy 2) Builders risk policy 3) General liability Umbrella  

Funding 100% of purchase price and half or all of he rehab costs.

If you buy the property right, with hard money lenders you can finance the purchase price AND a portion or all of the repairs.

Here is my list of comprehensive items to account for when evaluating an investment: 1) Mortgage2) Mortgage insurance (PMI or MIP) or FHA Risk base3) Property Taxes4) City Taxes5) HOA (Home Owner’s Association) Dues and Fees and Assessments6) Insurance Property Hazard InsuranceFlood InsuranceEarthquake InsuranceUmbrella Insurance7) Vacancy Rate (usually 8% - the equivalent to one month a year, or 5-6% if multifamily and/or if experienced, if not use 8%)8) Utilities (you’ll have some or all of these if your tenant is not covering them and/or during vacancy) Water § Sewer § GarbageElectricityNatural GasPropane9) General Maintenance (usually 5%) Upkeep § LandscapingSnow removalRepairsNew Appliances10) Capital Expenditures (usually 5%, higher is the property is old and obsolete, less if fully rehabbed and all mechanicals and roof are new)11) Property Management (8%, even if you self manage, your time still has value and there might be a time when you'll want to be completely hands off or you'll not be able to do it, vacation, retirement, etc.)

Or all properties into one LLC ?

Depending on the loan type, you can sometimes get partial or all those professional costs covered under the loan (so you pay yourself back) or they can even count towards the equity in the property and be used towards the down payment requirements. 

The 4 bullet points in my first post of this thread we’re not placed in any specific order of importance as I would argue that each of the 4 are equally important but you are correct, if more or all would head the advice of #4, the wholesaling industry would not have such a dark cloud over it. 

I am not being cynical but the fact is negotiation is about your active vocabulary, body language, Oral communication skills, etc. which are acquired skills.

The key thing is to not let any one or all of these things make you desperate.

Mind you on these I would use mini splits.secondly, would you recommend a barndomenium style, brick with vinyl siding, or all vinyl?