25 Years old buying parents house

[Jean Carias]

Good after noon everyone,

Im in the Fairfield county area in CT and Ive been researching and trying to buy the last 2 years but unfortunately covid made this area very hard to get into especially alone. Ive exhausted a lot of options and partnerships havent worked so far. Ive also changed jobs which I had to take pay cut but its still in the same field. Ive decided to just buy my parents house but I was wondering if theres a better way into financing then just going for an FHA or conventional.
What i want to accomplish 
-Defer their capital tax gains 
-No down payment or some kind of mortgage/installments payments to "sellers"

They owe roughly 167,xxx and the house is worth about 350,xxx.
On my own i can afford 300,000 in FHA which i dont want to use because of some work that has been done we might not get approved. Im comfortable with the work done here so no need to talk about that thanks. 

What I would like to do is possibly get a conventional loan ( which would be at a lower amount than 300k) and have subject to or some kind of contract stating I will pay them the rest within a period of time. 

**** i had saved this from another post a while back can someone elaborate on it ?*****

Wash and Wear - This is a straight forward way of acquiring title without cash, a “give and take.”

This is a method that forms a template for all assumption and “subject to techniques”. Try to make this financing method fit where ever you can. The most common variation on this theme is an assumption in which the buyer takes the property and any existing notes “subject to” and executes a subordinate note for the seller’s equity. A very straight forward way of acquiring title without cash. A simple give and take. The seller gives the property to the buyer and takes a note for the equity.