Trudy thought it was about a loan for a house. So, to me, it's clear they were calling about a personal loan. Pete was surprised the bank called him at home--it wouldn't be the first time instructions to call at work were not followed (it happens to me all the time).
It WASN"T a loan for a house, though, and Trudy was wrong, so I fail to see how that clarifies that it was a personal loan. On rewatch, its hard to hear, but the exact line from Trudy, after she mentions the bank calling, is "...something about a loan" and then its never clarified if it is about the company loan or him calling them for a personal loan.
I also have a hard time believing Pete would think he could get a personal loan of $50K from a bank in 24 hours time. Or some such short time. No way that would happen now or then.
I still say the bank was not calling about a personal loan, they were calling about the loan for the company. I know he had to put up the money as collateral and he didn't have it, but I still don't think he called the bank for a loan without talking to Trudy. And if he did, I think he would have made it very clear to call him at work, not at home.
The loan was for the company, but the collateral was coming from savings and possibly the co-op. If the company wasnít able to pay back the loan, Pete (and Trudy) would still be on the hook
I realize they would be on the hook if the company cannot pay back the loan and stated this in an earlier post. However, it also means they could very well get the money back and not be out $50K as long as the company stays afloat for 6 months.
Also at the end of the scene, Trudy's words are, and I am paraphrasing, that she FORBIDS him from giving the company ANYTHING ELSE. Or she may have said putting anything else into that company, something along those lines, meaning not only $50K was out of the question but that NOTHING they had was to be sacrificed for his job.
Also on other topics, right after Don writes the letter to the NYT, we see him swimming in the pool, as if cleansing himself and being dechlorinated personally of any further tobacco ads.
And when Roger is talking about doing anti-smoking ads, he is, of course, blowing out smoke from a cigarette.
And Bert states he is mad he didn't put all their names on the letter, but in fact he signs the letter as Don Draper, Sterling-Cooper-Draper-Pryce, so their names are on it, in a way.