The UHaul ratio is actually defined as the ratio of the cost to move from San Diego to city X vs the cost of moving from city X to San Diego – so, without naming city X we can’t really talk about the UHaul ratio
The 4 to 1 ratio is for Austin, TX if I remember correctly – I’ve gotten tired of trying to educate people about the real estate debacle currently unfolding so I don’t always provide detailed data when I post and I don’t post very often anymore (got burned out trying to educate trolls and idiots – and I bet none of them bought any silver or gold based on my recommendations (numerous) when silver was under $7 and gold was around $500)
A quick google didn’t find any sites for UHaul ratios but you can determine the current value for yourself
Call UHaul on the phone and price a truck from city x to San Diego and vice-versa – please let us know if you find ANY UHaul ratios that indicate a migration into San Diego