Ladies, I think what the boss said is right
Here's my take.
Arguing: A good relationship needs a good foundation. Arguing and 'trying to hold it together' at the start is not a good foundation.
...time to run!
Money: Any man who is serious will have an idea of how much he will have to spend to pull it off. Some guys will be sailing pretty close to the wind but that doesn't mean they can't support you. Being careful with money shouldn't be taken as a sign he is broke... maybe he's just being sensible which should be seen as a quality. However, if he's struggling financially to make the first trip to PI... he ain't got a hope of funding the rest.
Doesn't want to visit: Yes, he should be gagging to get to you... and you should feel the same. Also, a relationship naturally has to move forward or it will starve. However, you do need to consider his work commitments. Don't assume he can drop everything, fly half way round the world, so you can leap into his arms like the scene in Armageddon! Personally, I would ask right at the start with all the other questions... but tactfully.. like, 'if he met a girl he liked, would he visit her and when?'. If he answers 2/3 months for example, hold him to it, then if he starts making excuses
.... time to run!
Good luck to you all