So if I get this house I am looking at under contract and the owner lives there, how do I go about doing a showing with an end buyer?

That's why the buyer went to the other street & why the seller on your street had to put it on sale to get it sold.Never rent in owner occupied areas. 

However, you can still run into issues if you finance the wrong buyer and they stop paying.

Example: Property goes under contract with distressed owner /=/ property gets marketed to cash buyers /=/ another wholesaler comes along interested in the property with a cash buyer in hand ready to buy /=/ contract gets assigned to secondary wholesaler /=/ wholesaler assigns to end buyer and closes within the contracted time frame of the original owner to wholesalers contract.

some youtube channels recommend finding buyers first , asking their criteria but some say to find the deal first market it & then buyers will come to you ?

Sometimes there's a period of time only for owner occupied buyers and after that if it doesn't go under contract, the home opens up to investor bids.

@Kimi Ho similar to 1031 exchange name change where everything tied with buyer/seller SSN/EIN and you cant mix funds for 2 separate EINs/SSNs , properties needs to have separate account as tax paying entity to county office (i.e. 2 separate tax bills aka 2 addresses).  

How do i know what is the most i can offer to win the contract, so that the buyer and I can turn a good profit?   

Why not save 3.5% for a down payment and FHA or first time home buyer grant it.

Worth or Denton but have been considering starting the hunt - only fear is I am just not as familiar with the areas as I am in Dallas now.Really looking for simple, conservative investments that could be bought and held (1% 'rule') in places where I'd have my family live.