"Default User" wrote snip; look back
Well you drug ;-) the OP down that path by not mentioning that he can avoid the taxes and have all his funds held at one institution in a TIRA and Roth IRA. Technically two accounts but this would all be under his name at the one institution.
Or if one wants to get technical about it, he could withdraw his contributions without penalty from the Roth and likely end up just having the TIRA. All to get "one account." But this would be silly.
It seems clear to me what the OP wants (or should want, so as to minimize taxes) is to have all his funds at one institution in a TIRA and RIRA and which under his direction will manage it all under his name as if it were one big portfolio. Which it is.
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